Abstract: A service provider server has management means which manages a user ID corresponding to a service user and a device IDs corresponding to an information processing terminals of the service user in association with each other.

Abstract: A processing state management apparatus to be connected to a distribution server that carries out a transaction to register or delete content to be distributed, includes a transmitter which transmits a request requesting the distribution server to carry out the transaction, and a state updater which, after the processing state management apparatus has requested the distribution server to carry out the transaction, holds state information indicative of the state of the transaction in the distribution server as representing processing in progress until the processing state management apparatus receives a notification of completion of the transaction from the distribution server.

Abstract: A content distribution system. A distribution management and unauthorized operation management device generates a one-time URL by using URL of content information specified by a user terminal and transmits the one-time URL and bandwidth information concerning the content information to the user terminal.

Abstract: A video and audio stream is predicted that is to be selected for reception next to a video and audio stream that is being received by the terminal or that is after a video and audio stream that has been selected for reception by the terminal. Resources necessary for delivering the predicted video and audio stream, in addition to resources necessary for the video and audio stream that is being received by the terminal or that has been selected for reception by the terminal, are secured in advance before a user of the terminal selects the next video and audio stream. The predicted video and audio stream is not delivered to the terminal before it coincides with a video and audio stream that is selected at the next zapping.

Abstract: The present invention aims to realize a system and method of reliably performing multicast communication via a bandwidth-guaranteed network, and provides a multicast communication system for performing multicast communication via a bandwidth-guaranteed network, the system including: a multicast proxy response device added with a group address destination identifier; and a multicast client, wherein the multicast proxy response device transmits a session connection request to the group address destination identifier of the multicast proxy response device when starting reception, the multicast proxy response device which has received said session connection request transmits a session connection response to said multicast client, and the multicast client receives multicast data through a bandwidth secured in the bandwidth-guaranteed network by the session connection response.

Abstract: A first communication apparatus executes a session control protocol thereby to determine a session identifier which identifies a session for media-related protocols for transferring the data when the session is established, and thereafter executes the media-related protocols thereby to perform communications for transferring the data on the session. A second communication apparatus executes the session control protocol thereby to establish a session for the media-related protocols with the first communication apparatus, and thereafter executes the media-related protocol thereby to perform communications for transferring the data with the first communication apparatus on the session.

Abstract: A processing state management apparatus holds state information indicating the state of transaction processing in a distribution server as in progress after the processing state management apparatus connected to the distribution server requests the transaction processing to the distribution server which executes the transaction processing to register or delete contents to be distributed until the processing state management apparatus receives the notification of completion of the transaction processing from the distribution server.

Abstract: A service providing system is connected to a user terminal via a network, acquires a request message described with an upper layer protocol exceeding three layers for requesting desired data and transmitted by the user terminal, and analyzes the content of a body portion of the message. In the case where unwanted information or unusual information is contained in request content, the unwanted information or the unusual information is eliminated by subjecting the request message to a predefined process.

Abstract: A service provider server has management means which manages a user ID corresponding to a service user and a device IDs corresponding to an information processing terminals of the service user in association with each other.

Abstract: A content distribution system. A distribution management and unauthorized operation management device generates a one-time URL by using URL of content information specified by a user terminal and transmits the one-time URL and bandwidth information concerning the content information to the user terminal.

Abstract: It is possible to provide a video audio stream distribution system, a distribution method, and a distribution program which can improve the stream switching speed during zapping and suppress the actually used network resource in streaming for which QoS is guaranteed. Zapping destination means (211) predicts a stream required for the next distribution request and band managing means (209) instructs only band allocation for the predicted stream to band control means (205) before a distribution request is made by an actual zapping operation.

Abstract: The present invention aims to realize a system and method of reliably performing multicast communication via a bandwidth-guaranteed network, and provides a multicast communication system for performing multicast communication via a bandwidth-guaranteed network, the system including: a multicast proxy response device added with a group address destination identifier; and a multicast client, wherein the multicast proxy response device transmits a session connection request to the group address destination identifier of the multicast proxy response device when starting reception, the multicast proxy response device which has received said session connection request transmits a session connection response to said multicast client, and the multicast client receives multicast data through a bandwidth secured in the bandwidth-guaranteed network by the session connection response.

Abstract: A video and audio stream is predicted that is to be selected for reception next to a video and audio stream that is being received by the terminal or that is after a video and audio stream that has been selected for reception by the terminal. Resources necessary for delivering the predicted video and audio stream, in addition to resources necessary for the video and audio stream that is being received by the terminal or that has been selected for reception by the terminal, are secured in advance before a user of the terminal selects the next video and audio stream. The predicted video and audio stream is not delivered to the terminal before it coincides with a video and audio stream that is selected at the next zapping.

Abstract: A first session proxy device is disposed between a client device having no control protocol for bandwidth securing sessions installed therein and a bandwidth guaranteed network. A second session proxy device is disposed between a server device having no control protocol for bandwidth securing sessions installed therein and the bandwidth guaranteed network. When the client device and the server perform communication over the bandwidth guaranteed network, the first session proxy device establishes a bandwidth securing session in the bandwidth guaranteed network, in place of the client device, while second session proxy device establishes a bandwidth securing session in the bandwidth guaranteed network, in place of the server device.